Bug 2520501

Summary: CVE-2026-65914 cachelib: DOMPurify: Cross-Site Scripting vulnerability allows arbitrary code execution [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: cachelibAssignee: Michel Lind <michel>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: michel
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["8dae98f5-fd70-458e-839a-e2b403cd1fef"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Clone Of: Environment:
Last Closed: 2026-08-21 21:08:42 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2443016, 2506430    

Description Ganesh 2026-08-20 16:15:00 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper context during reparsing, reactivating dangerous markup with event handlers to execute JavaScript.
Comment 1 Michel Lind 2026-08-21 21:08:42 UTC 
This CVE is in a JavaScript/NodeJS package; the JavaScript here is not shipped in the binary RPMs.